System of electrical distribution.



No. 894,668. PATENTED JULY 28, 190 8. 0. 0. KRUH.-

, "SYSTEM OF ELECTRICAL DISTRIBUTION.

:APPLIOATION FILED 23.15, 1907.

IVITNESSES: JMYEAZTUH 75135 L7. .KHUH.

I L changing the vo i addition to these elements therectifieris pro- 1 UNITED STATES 'OSIAS 0. KRUH, orsonnnnoranngnnw YORK, Assreuon-To enn'naarvsnnc'rnrc ooMrANn,

A CORPORATION on NEW'Yoiur' I srsrsnror nmonnrcanmsrnreorion;

170.89%,568. 'F-SpecifieationofLe'ttere'Patent. Patented-July ea-1908.

,APP zation;filedl ebruary 15,1901. Serial No.f357,466.'

vided-with, auxiliary anode arms containing anodes7 and 8 he main -anodes'receive current from the secondary 9 of' a trans-' formertandmay' be connected therewith through switches 10 and 11, Thief-trans- 'former may be of the well known constant current type giving constant, secondary current: e'main' wlnding ofithe'transformer secondary is'connectedz-directly across the main anodes of the rectifier," but the transformer secondary is provided with auxiliary turns 12fand 13 wound on the same core and servin tostep upthe sidera 1y higher than normal secondary volload circuit- Such a rectifienas usually contage. This total voltage may be applied distructed, comprises a, lurality of anodes and reotly acr'oss'the auxillary anodes 7 and 8 a single cathoderincl c sed in a an evacuated through suitable switches14 and 15. In the envelop. "The anodes receive energy from drawing the load oircuitof the rectifier has the secondary of an alternating current trans been-indicated diagrammatically-at16, but former, and the cathode delivers-direct cur-- it willbe understood ithat the loadmayzconrent to the load circuit. The volta e on the sistof arc lamps or of other well known trans- "be, decreased by t e'jintrolat'ing devices. Areactance 17 may beused Tocll whom it-maycon'cm: I

Be it kn that 1, Denis .Orrro' Knots, a subject ofithe Emperor of A1istria-I-Iunga-ry, 1 re's'idingat Schenectady, county of. Eachen'eLc- :tady, State of New York, have invented cer- -tain' new and useful Improvements vin Sys-. tems'of Electrical Distributiomof which the ,following is a specification. 1 y inventi'on'irelates to systems for elec- .trical distribution in which, vapor electric deyicesareo erated 3 apor e ectrioj. devices may be-used in a 'well own manner for rectifying alternating current and delivering-direct current to a waves to keep the rectifier a "ve. 2 j When the rectifier somewhat lowered bythe use of this react iary-anodes 7 and 8' the. voltage su plied to however, so easy or conven the load circuit is. (l

to raise thevoltage on the load circuit a a ove its normal value, provided the system is'maintained at a i power factor when operating undernorma conditions. My present i" ention comprises means for ti'f'ge on the load by a certain amount without chan'gi the voltage on the main anodes of'the re c t' er and without in .troducing reactance or resistance in series with the primar I ,of' the transformer. In general, the regu ating effect is producedby shifting the arc of.- the rectifier tube from the main anodes to the auxiliary anodes, [the latter receiving current at higher voltage than that supplied to the mainanodes.- j I j I e accom anying drawing illustrates "one and openjswitc es 14 and1,1

. a'p lication 0 my invention tq;praotice.i is,*of course,accompanied,b

hev rectifier tube. comprises the usual the load voltage.- 'evacuated envelop l -ha;v1n"g=\3jadial anode r ams 2and 3, and amerciiryfcathode 4. The rect fier: is -P': also provided with. .a starting with current through aresistance 6. I he arrangement and operation of the elements above enumerated are well understood by persons skilled in'the art. In

al running vo II pendent on the number .of aiunliary turns 12, and 13 of the transf 'rmersecondary. sired these'auxiliaryturns small cross-section [and th cost, but in I eh I temporarilyas .ing; otherwise they mightlbe heate by the ]passage of, current; i

It w .bereadily-understoo that t re" -.of small tifier ma I lower vo tage by th Hand-15., I I e are from anode 7 814 3, f. 'is. only necessa to close {ewi;

An increascgin from the main anodes to the auxilia The readiness with which the-c load voltage can be. efiected,'and. the good anodes.

II ystem .well adapted for oad lcircuits which,

that case vthe auxiliary turns eration, particularlg fin con--- to assist inpausin'g' overla of thecu'rre'nt' 8 0 y a value de- If defmaybe-made of ere o I in startd crease in?" I I voltage" can similarly' be produced byg backange in power factor of the system.underlall condi y Iv no time main anodes therefor, a load circuit connectto time vary in resistance, or which have a starting resistance considerably hlgher than the normal running resistance.

What I claim as new and desire to secure byLetters Patent. of the United States, is,-' 1.7v The combination ofi'a vapor rectifier,

,. ed to said rectifier, a transformer connected with said main anodes, auxiliary anodes for said; rectifier, and meansxfor varying the voltage on the load b shifting the archetween said "main ano said auxiliary anodes. a

2. The coinbinationofi ava or are rectifier havin a plurality ofpairso anodes and a catho e, a load circuit connected to said cathode, and'means'for materiall varying th voltage of theloadcurrent by s 'iftingthe fi 'r fronrjone pair 0f anodes to another.

current. a q .1 4- The. com

anodes for saidjrectifier, an means for val?- in the voltage on said lo'adcircuit by sh another.

ing the vapor are from one pair of anodes to I a I inst-1336f a load ircuit, a. vapor arc rectifier de 'verin' current thereto,

5. The combination of a load circuit, a

vapor rectifier connected therewith, anodes for said vapor rectifier connected with the secondaryof a transformer, a connection between said secondary and one side of said load circuit, auxiliary anodes for said rectifier, and means for connecting said auxiliary anodes with auxiliary turns on said'transformer secondary. 6. The combination of a load circuit, a vapor rectifier connected therewith having a plurality of pairs of anodes, a transformer 0r su plying energy to said rectifier, connections ordehvering normal potential to one pair of said anodes, and connections by which abnormal potential may be delivered to another pair of said anodes to change'the voltage on said load circuit.

7. -The combination of a transformer primary, a secondary for said transformer having a central tap and auxiliary turns, a vapor rectifier receiving energy from said transformer secondary,'a load circuit connected between said rectifier and said centrai tap, main anodes for said rectifier, additional anodes for said rectifier, and means for connecting said additional anodes with the auxiliary turns of said secondary.

In witness whereof, I have hereunto set my .hand this 13th day ofFebruary, 1907. OSIAS O. KRUH. Witnesses:

HELEN Onroan,

MARGARET E. WOOLIJRV 

